X-ray Emission and Discharge Behavior on Three Kinds of Stacked Pyroelectric Single Crystal Units

YAMAMOTO Takashi, MIYAZONO Takuji, KURIMOTO Akihito

doi:10.57415/xshinpo.50.0_291

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形状の異なる焦電結晶積層体によるX線発生挙動および放電特性
ケイジョウノコトナルショウデンケッショウセキソウタイニヨル Xセンハッセイキョドウオヨビホウデントクセイ

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<p>Three types of stacked LiTaO₃ single crystal units were assembled to investigate effects of shape of the single crystal and degree of ambient pressure on X-ray emission and discharge behavior based on the pyro electricity. Every instantaneous emission of visible light due to discharge occurred at the side of stacked crystals during heating and cooling cycle between room temperature and 400 K under atmospheric pressure. Discharge frequency on a stacked unit made of equal-sized four pieces (type-A) was five times more than that on a unit made of irregularly-sized pieces (type-C). Discharge occurred possibly at narrow gap between two pieces of plate-like single crystal. During heating process up to ca. 400 K under 1 or 10^-⁴ Pa, spike-like X-ray emission for a few seconds through one minute occurred repeatedly on both type-A and -C units. The maximum energy of emitted X-ray was independent on both degree of vacuum and shape of stacked plate-like LiTaO₃ single crystal. Discharge on type-A unit was suppressed by coating of stacked crystals with dielectric grease whereas high voltage generated on the coated unit. Origin of spike-like X-ray emission and discharge on stacked LiTaO₃ units was discussed.</p>

Journal

Advances in X-Ray Chemical Analysis, Japan

Advances in X-Ray Chemical Analysis, Japan 50 (0), 291-298, 2019-03-31

The Discussion Group of X-Ray Analysis, The Japan Society for Analytical Chemistry

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